In-gap corner states in core-shell polygonal quantum rings

We study Coulomb interacting electrons confined in polygonal quantum rings. We focus on the interplay of localization at the polygon corners and Coulomb repulsion. Remarkably, the Coulomb repulsion allows the formation of in-gap states, i.e., corner-localized states of electron pairs or clusters shi...

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Autores principales: Sitek, Anna, Ţolea, Mugurel, Niţă, Marian, Serra, Llorenç, Gudmundsson, Vidar, Manolescu, Andrei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223208/
https://www.ncbi.nlm.nih.gov/pubmed/28071750
http://dx.doi.org/10.1038/srep40197
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author Sitek, Anna
Ţolea, Mugurel
Niţă, Marian
Serra, Llorenç
Gudmundsson, Vidar
Manolescu, Andrei
author_facet Sitek, Anna
Ţolea, Mugurel
Niţă, Marian
Serra, Llorenç
Gudmundsson, Vidar
Manolescu, Andrei
author_sort Sitek, Anna
collection PubMed
description We study Coulomb interacting electrons confined in polygonal quantum rings. We focus on the interplay of localization at the polygon corners and Coulomb repulsion. Remarkably, the Coulomb repulsion allows the formation of in-gap states, i.e., corner-localized states of electron pairs or clusters shifted to energies that were forbidden for non-interacting electrons, but below the energies of corner-side-localized states. We specify conditions allowing optical excitation to those states.
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spelling pubmed-52232082017-01-17 In-gap corner states in core-shell polygonal quantum rings Sitek, Anna Ţolea, Mugurel Niţă, Marian Serra, Llorenç Gudmundsson, Vidar Manolescu, Andrei Sci Rep Article We study Coulomb interacting electrons confined in polygonal quantum rings. We focus on the interplay of localization at the polygon corners and Coulomb repulsion. Remarkably, the Coulomb repulsion allows the formation of in-gap states, i.e., corner-localized states of electron pairs or clusters shifted to energies that were forbidden for non-interacting electrons, but below the energies of corner-side-localized states. We specify conditions allowing optical excitation to those states. Nature Publishing Group 2017-01-10 /pmc/articles/PMC5223208/ /pubmed/28071750 http://dx.doi.org/10.1038/srep40197 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Sitek, Anna
Ţolea, Mugurel
Niţă, Marian
Serra, Llorenç
Gudmundsson, Vidar
Manolescu, Andrei
In-gap corner states in core-shell polygonal quantum rings
title In-gap corner states in core-shell polygonal quantum rings
title_full In-gap corner states in core-shell polygonal quantum rings
title_fullStr In-gap corner states in core-shell polygonal quantum rings
title_full_unstemmed In-gap corner states in core-shell polygonal quantum rings
title_short In-gap corner states in core-shell polygonal quantum rings
title_sort in-gap corner states in core-shell polygonal quantum rings
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5223208/
https://www.ncbi.nlm.nih.gov/pubmed/28071750
http://dx.doi.org/10.1038/srep40197
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